Buderus MCM10 Notice D'installation page 15

LED OFF
No. Function Diagnosis
3 Switching Operation: Switch-
contact for ing contact not acti-
remote vated; not a fault.
fault indica-
tion Fault: Switching
120 VAC contact activated,
but no line voltage.
4 Communi- Operation: No
cation communication
between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS).
Fault: No communi-
cation between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS).
Tab. 9 Operating and fault indications on the MCM10 module
MCM10
ON
Remedy Diagnosis
– Fault: no heating
appliance attached
to the MCM10 oper-
ational.
Check power sup- Fault: Supply tem-
ply. perature sensor
defective.
Replace MCM10
module.
Fault: System pres-
sure too low.
Fault: no communi-
cation between the
MCM10 module
and all connected
heating appliances
for at least 1 minute.
Standard operating Operation:
mode with only one Communication
MCM10 module or between this
with the MCM10 MCM10 module
master without and the previous
2-wire BUS control- module or the heat-
ler. ing controller
(2-wire BUS).
Check the corre-
sponding connec-
tion cable.
Replace the
MCM10 module or
heating controller.
Operating and fault indications
Flashing
Remedy Diagnosis
Remove fault(s) on
the heating appli-
ance(s).
Check temperature
sensor on the
MCM10 master and
its lead.
Replace the
MCM10 module.
Add water to the
system.
Check the corre-
sponding connec-
tion cable.
Replace MCM10
module.
– Configuration:
Communication
between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS).
Fault: No communi-
cation between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS),
although these com-
ponents are
installed.
Fault: No communi-
cation between this
MCM10 module
and the previous
module or the heat-
ing controller
(2-wire BUS)
because these com-
ponents have been
deliberately
removed
5
Remedy
Wait until the con-
figuration has com-
pleted. The LED will
then be illuminated
steadily.
Check the corre-
sponding connec-
tion cable.
Replace the
MCM10 module or
heating controller.
Reset the configura-
tion
( paragrahp 4.3).
15